PUSHPAM, P. R. L.; YOKESH, D. Differentials in certain classes of graphs. Tamkang Journal of Mathematics, [S. l.], v. 41, n. 2, p. 129–138, 2010. DOI: 10.5556/j.tkjm.41.2010.664. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/664. Acesso em: 4 may. 2024.